1. Department of Electrical and Computer EngineeringFaculty of EngineeringKing Mongkut's University of Technology North BangkokBangsue10800BangkokThailand
2. PEMD LaboratoryDepartment of Electrical EngineeringFaculty of EngineeringKing Mongkut's University of Technology ThonburiThung Khru 10140BangkokThailand